Wireless band choice

[Neil Houghton]

Hi all,

As a result of changing internet plan, I scored a new modem. It creates 2
wireless networks - one on 2.4GHz and one on 5GHz.


Both appear to work just fine so I used the option click on the wireless
menu-bar icon to see what differences were apparent. Report as follows:

2.4GHz network:
RSSI: -68
Transmit rate: 117
MCS Index: 14


5GHz network:
RSSI: -70
Transmit rate: 162
MCS Index: 12


I'm not sure what that all means  ;o)

I understand transmit rate - which would seem to suggest that the 5GHZ at
162 is performing slightly better than the 2.4GHz at 117 ??


Are the other figure significant?
Are there other factors to consider when choosing which network to use?



TIA



Cheers



Neil
-- 
Neil R. Houghton
Albany, Western Australia
Tel: +61 8 9841 6063
Email: n...@possumology.com


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Re: Mail problem

[Ronni Brown]

> On 8 Feb 2017, at 7:22 am, John Thompson  wrote:
> 
> Since upgrading the Os on my 13” Macbook Pro (2012) Mail will not open.  It 
> quits within a couple of secondsor less each time I try toopen it.  Is there 
> any way I can re-install Mail for this computer?  Do not have any problemson 
> the older MacMini running OS 10.11.6 and Mail 9.3.
> 
> Thanks in anticipation
> 
> John Thompson

Hi John,

A couple of questions first:
A] Is this since upgrading from OS X 10.11.6 to macOS Sierra 10.12? or updating 
macOS Sierra10.12 to 10.12.3?
B] Do you receive any error message as to why Mail quit?
C] Have you tried Restarting your MacBook Pro after Mail Quits, then launch 
Mail right after you restart?

I would first suggest you “Try A Safe Boot”

To perform a safe boot, follow these steps:
1. Start or Restart your Mac.
2. Hold the Shift key immediately when you hear the startup chime, press the 
Shift key and hold it down until the gray Apple logo appears on the screen.
3. Release the key when you see the gray Apple logo

Your Mac will complete the startup process, which will take considerably longer 
than usual. 
You’ll eventually see the words “Safe Boot” on the screen—possibly within the 
login window, depending on which version of macOS you’re running.

4. Open Mail.app as soon as startup process completes.

If rebooting in safe mode solves the problem, you know that some system level 
process is at fault or that one of the caches disabled by safe mode was 
corrupted. 

5. Restart normally and see if the problem is gone.

Regards,
Ronni

13-inch MacBook Air (April 2014)
1.7GHz Dual-Core Intel Core i7, Turbo Boost to 3.3GHz
8GB 1600MHz LPDDR3 SDRAM
512GB PCIe-based Flash Storage

macOS Sierra 10.12.3

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Mail problem

[John Thompson]

Since upgrading the Os on my 13” Macbook Pro (2012) Mail will not open.  It 
quits within a couple of secondsor less each time I try toopen it.  Is there 
any way I can re-install Mail for this computer?  Do not have any problemson 
the older MacMini running OS 10.11.6 and Mail 9.3.

Thanks in anticipation

John Thompson

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